First of all, I am so sorry for your loss. I know how devastating it can be.
I highly endorse you finding her a flock mate. Chickens are social birds and do best with someone to hang out with. We tried keeping only 2 for several years and we were scrambling to find a new friend a couple of times. We then went to 3 to have a "spare". Here is our spare chicken, the beautiful Lilly.
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Unfortuntely, Lilly is no longer a "spare" as my dear Daisy passed a few weeks ago. What having a flock of three has provided is time to decide what we wanted to do next with our flock.
Additionally the members of a flock serve different roles. Without companions a lone hen will be responsible for everything. For example, In a typical flock, one of the members assumes the role of a sentry (Sentinel). They watch for predators while eveyone else searches for food confident that someone is watching for them. The Sentinal is never the Alfa hen (if there is no rooster). Once we went to 3 hens I was able to watch this behavior save the flock from attack a few times (skunks and hawks). Daisy would have been hawk food if not for Patsy's alert. Daisy managed to duck into a lilac bush just in time. My Patsy was apppinted permanent Sentinal by the flock and she has done a great job keeping everyone safe.
Always remember, it is your flock, you care for them as best you can. Whatever I suggest is just my opinion.
Having said that, I would reccomend you go to three hens. I feel it is a much more stable flock size than two. It is not really chicken math (or so i keep telling myself).